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Finding the Fourth Proportional to 764,900.80, 1,147,302.60 and 259,460.80

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Solution

The fourth proportional to 764,900.80, 1,147,302.60 and 259,460.80 is: 389,174.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,900.80 : 1,147,302.60 = 259,460.80 : x
  2. Step 2: Convert to fraction form
    764,900.80/1,147,302.60 = 259,460.80/x
  3. Step 3: Cross multiply
    764,900.80x = 1,147,302.60 × 259,460.80
  4. Step 4: Simplify right side
    764,900.80x = 297,680,050,438.08
  5. Step 5: Solve for x
    x = 297,680,050,438.08/764,900.80
  6. Step 6: Final answer
    x = 389,174.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.